Laboratory study demonstrates efficient carbon dioxide reduction into solar fuels via a CsPbBr3 quantum dot-graphene oxide composite, highlighting new opportunities for perovskite photocatalysis.
Halide perovskite quantum dots (QDs), primarily regarded as optoelectronic materials for LED and photovoltaic devices, have not been applied for photochemical conversion (e.g., water splitting or CO₂ reduction) applications because of their insufficient stability in the presence of moisture or polar solvents. Herein, we report the use of CsPbBr₃ QDs as novel photocatalysts to convert CO₂ into solar fuels in nonaqueous media. Under AM 1.5G simulated illumination, the CsPbBr₃ QDs steadily generated and injected electrons into CO₂, catalyzing CO₂ reduction at a rate of 23.7 μmol/g h with a selectivity over 99.3%. Additionally, through the construction of a CsPbBr₃ QD/graphene oxide (CsPbBr₃ QD/GO) composite, the rate of electron consumption increased 25.5% because of improved electron extraction and transport. This study is anticipated to provide new opportunities to utilize halide perovskite QD materials in photocatalytic applications.
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Xu et al. (2017) studied this question.
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